This alert expired on 4 July 2026 at 02:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 71 detections recorded within 20 km of this point since 23 April 2026. The last comparable one was on 2 July 2026. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 7:45PM MDT until July 3 at 8:15PM MDT by NWS Rapid City SD
Nearby, since 23 April 2026
- July 2, 2026 · score 22 · 18.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 41.3010, -102.8361 |
| Nearest City | Cheyenne (167 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-04T01:45:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.35f6b2b12a5223d02a30b1157bd6919c |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fall River, SD; Cherry, NE; Garden, NE; Grant, NE; Hooker, NE; Sheridan, NE; Logan, CO; Washington, CO and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 7:45PM MDT until July 3 at 8:15PM MDT by NWS Rapid City SD |
| Expires | 2026-07-03T20:15:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.35f6b2b12a5223d02a30b1157bd6919c36441bde.001.1","noaa_urn:oid:2.49.0.1.840.0.3c835a840446d0e7ca8412c9c631091a6890f1a9.001.1","noaa_urn:oid:2.49.0.1.840.0.b0d4081bdce8451c57c6e4b81d76821b2d3b0427.001.1","noaa_urn:oid:2.49.0.1.840.0.5b1289b88b2355c7a404447dd598421fd1dfadb7.001.1"] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.